RADIATION PRESSURE ON AN ACOUSTIC CYLINDER IN THE INTERMEDIATE AND FAR ZONES OF AN ULTRASONIC FIELDA. I. Brazhnikov and N. I. Brazhnikov UDC 620.179.16 The field of an acoustic transducer in the region of detection of an ultrasonic wave beyond the near zone is considered as applied to nondestructive check of the surface density of foil-film materials by the method of their irradiation with an ultrasonic wave through air. The results obtained refine the existing concept of the pressure distribution on the surface of an acoustic cylinder in the intermediate and far zones of the field. IREDMET, Moscow, Russia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 1, pp. 134-137, January-February, 2003. Original article submitted August 30, 2001; revision submitted June 24, 2002.